Date:February 7, 2018
Country: United States
Maple
Oak
Bark
Stems/Stalks
Biomaterials
Bullet-resistant armor plate
Application
Description Some varieties of wood, such as oak and maple, are renowned for their strength. But scientists say a simple and inexpensive new process can transform any type of wood into a material stronger than steel, and even some high-tech titanium alloys. Besides taking a star turn in buildings and vehicles, the substance could even be used to make bullet-resistant armor plates.
Pathway Description: Their simple, two-step process starts with boiling wood in a solution of sodium hydroxide (NaOH) and sodium sulfite (Na2SO3), a chemical treatment similar to the first step in creating the wood pulp used to make paper. This partially removes lignin and hemicellulose but it largely leaves the wood’s cellulose intact, Hu says.The second step is almost as simple as the first: Compressing the treated wood until its cell walls collapse, then maintaining that compression as it is gently heated. The pressure and heat encourage the formation of chemical bonds between large numbers of hydrogen atoms and neighboring atoms in adjacent nanofibers of cellulose, greatly strengthening the material.
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Tags: Super WoodBulletproof WoodSuper Dense Wood
Biomaterials
Bullet-resistant armor plate
Types of Feedstock
Forest residue
Name
Oak wood,Maple wood
Form
Solid (logs planks or sheets)
Commercials
Readily available globally
Chemical
Pulping
Thermal
Boiling
Mechanical
Compressing
Educational Institution
University of Maryland